Question

In the following diagram the two DNA strands represented are ready for transcription.

In which of the four options, all the components (indicated by 1, 2, 3 and 4) respective functions are identified correctly –

• A.
  1. Site for Attachment of rho Factor – Termination of transcription; 2. Promoter – Binding site for RNA polymerase; 3. Coding Strand – Formation of promoter site alongwith template strand; 4. Terminator – Stoppage of transcription.
• B.
  1. Terminator – Stoppage of transcription; 2. Promoter – Binding site for RNA polymerase; 3. Noncoding Strand – Formation of promoter site alongwith template strand; 4. Site for Attachment of rho Factor – Termination of transcription.
• C.
  1. Terminator – Stoppage of transcription; 2. Promoter – Binding site for RNA polymerase; 3. Coding Strand – Formation of promoter site alongwith template strand; 4. Site for Attachment of sigma Factor – Termination of transcription.
• D.
  1. Terminator – Stoppage of transcription, 2. Promoter – Binding site for RNA polymerase; 3. Coding Strand – Formation of promoter site alongwith template strand; 4. Site for Attachment of rho Factor – Termination of transcription.

Answer 1

Answer: (D)

1. Terminator – Stoppage of transcription, 2. Promoter – Binding site for RNA polymerase; 3. Coding Strand – Formation of promoter site alongwith template strand; 4. Site for Attachment of rho Factor – Termination of transcription.